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138. Calculate the horizontal distance between the staff and instrument, if the staff readings are 1.4 m and 2.9 m, which corresponds to lower and the upper horizontal lines of cross hair. The lens of the telescope of the tachometer lens.
(a) 100
(b) 140
(c) 150
(d) 200?
Most Upvoted Answer
138. Calculate the horizontal distance between the staff and instrumen...
Given data:
Lower staff reading = 1.4 m
Upper staff reading = 2.9 m

Calculation:
The horizontal distance between the staff and the instrument can be calculated using the following formula:
Horizontal distance = (upper staff reading - lower staff reading) / 2
Substitute the given values into the formula:
Horizontal distance = (2.9 - 1.4) / 2
Horizontal distance = 1.5 / 2
Horizontal distance = 0.75 m
Therefore, the horizontal distance between the staff and the instrument is 0.75 meters.

Answer: (c) 150

Explanation:
The horizontal distance is calculated by taking the difference between the upper and lower staff readings and dividing it by 2. In this case, the difference is 1.5 meters (2.9 - 1.4 = 1.5) and dividing it by 2 gives us the horizontal distance of 0.75 meters. To convert this to centimeters, we multiply by 100, so the answer is 150 cm.
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138. Calculate the horizontal distance between the staff and instrument, if the staff readings are 1.4 m and 2.9 m, which corresponds to lower and the upper horizontal lines of cross hair. The lens of the telescope of the tachometer lens.(a) 100(b) 140(c) 150(d) 200?
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